Date: Wed, 27 Oct 2010 00:20:31 -0400 From: William Donzelli <wdonzelli at gmail.com> Subject: Re: What are these IBM 'thingys' More than a few, actually. There were many, including a trinary one (Super Bee or something. Anyone help?) that used cards with information only on the four edges of the card, but the choices were hole, no-hole, or hole-with-no-outside-edge. -- Will ++++++++++++++++++++ Don't forget EPCs (Edge Punched Cards); basically an 80 column format card with prepunched feed holes and 8-channel paper tape perforations along one edge.